the site of wednesday's debate. >> mitt romney is already in denver. getting in to the final campaigning and a last-minute endorsement from former broncos quarterback john elway but preparing for a much more critical stage on wednesday. >> so i look forward to these debates. i'm delighted that we will have three debates. it will be a conversation with the american people that will span almost an entire month. >> that stage at the university of denver is still being set for the first debate which will focus primarily on domestic issues. >> this is barack obama. how are you? >> president obama made some quick phone calls at a campaign office in nevada where he is going through debate rehearsals. >> basically they're keeping me indoors all the time. it is a prank. they are making me do my homework. >> part of that homework involves mock debates. the president taking on massachusetts senator john kerry while romney's partner is ohio senator rob portman. in the meantime, most of the public appearances and attacks before the debate are being handed off to th